Singleton is correct, most cams have the top of the lobe (max lift) the same height from the cam center line. This is roughly .010” less then the journal diameter. This means no matter what lift cam you have, all lifters will be at the same height at full lift. The lifters drop lower in the bore as the base circle is decreased. The lift is achieved by reducing the base circle. The issue is when the oil band drops out of the bottom of the bore while on the base circle. This is where my comment of careful measurements will be required comes from.
This is just a pet project for myself. The availability of the HT2148 lifter seems to be dwindling. The “replacements” have the oil feed hole in the wrong location and I don’t think they make the original style any longer.
The cam I’m using has .344” lobe lift on both intake and exhaust.
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